TW201501105A - Electronic paper display device and display device and driving method thereof - Google Patents

Abstract

The present disclosure relates to a driving method for a display device. The driving method includes: receiving image data of a next frame and comparing image data of a current frame with the image data of the next frame; providing corresponding driving waveform data based on the comparison; providing corresponding driving waveforms corresponding to the driving waveform data to drive the display device, such that the display device displays a next formal image corresponding to the image data of the next frame updated from a current formal image corresponding to the image data of the current frame, via displaying a plurality of transition images between the current formal image and the next formal image. For same a frame of the transition images, the driving method provides driving waveforms having the same duration to display units of each row of the display device. For different frames of the transition images, the driving method provides driving waveforms that not all have the same duration to the display units of same a row of the display device, such that the number of the frames of the transition images is reduced via delaying charging times of some transition images.

Description

Electronic paper display device, display device and driving method thereof

The present invention relates to a display device and a driving method thereof, and more particularly to an electronic paper display device and a driving method thereof.

Display devices, such as electronic paper display devices, have become more and more popular and become mainstream electronic products for the public to read information due to their advantages of flexibility, low power consumption, and high contrast.

Please refer to FIG. 1 and FIG. 2 together. FIG. 1 is a schematic structural view of a conventional electronic paper display device. 2 is a driving waveform diagram of the electronic paper display device shown in FIG. 1. In Fig. 2, the lower half of the waveform (b) is a partially enlarged schematic view of the upper half of the waveform (a). Among them, the upper half of the waveform (a) omits the drive clock signal clk (see the lower half of the waveform (b)), the lower half of the waveform (b) omits the frame scan enable signal stv (see the upper half of the waveform) (a)). The electronic paper display device 1 includes an electronic paper display panel 10, a timing control circuit 12, a scan driving circuit 14, a material driving circuit 16, and a common voltage generating circuit 18. The electronic paper display panel 10 includes a plurality of scanning lines 102, a plurality of data lines 104 insulated from the complex scanning lines 102, and a plurality of display units 105 arranged in a matrix. Each display unit 105 is connected to the scan driving circuit 14 via a scan line 102, and is connected to the data driving circuit 16 via a data line 104. The timing control circuit 12 is connected to the scan driving circuit 14 and the data driving circuit 16, respectively. The common voltage generating circuit 18 is connected to the complex display unit 105. The timing control circuit 12 stores therein a lookup table 122 in which a complex gray scale conversion relationship and drive waveform data corresponding to each gray scale conversion relationship are prestored. The grayscale conversion relationship refers to changing from one grayscale to another grayscale, and the two grayscales may be the same or different.

The timing control circuit 12 receives the image data output by an external image system 2, and compares the next frame image data with the current frame image data to obtain the required driving waveform data (see the driving waveform Data in FIG. 2). The timing control circuit 12 searches the lookup table 122, retrieves the required driving waveform data, and outputs the extracted driving waveform data to the data driving circuit 16. The data driving circuit 16 receives the driving waveform data, and provides a corresponding driving waveform to the complex display unit 105 according to the driving waveform data, so that the electronic paper display panel 10 displays the complex frame image from the current frame image. The screen is updated to the next frame image, wherein the current frame image corresponds to the current frame image data, and the next frame image corresponds to the next frame image, and the plurality of frame transition images are located in the current frame image frame and the next frame image frame. The driving waveform drives the electronic paper display surface 10 to sequentially display the plurality of frame transition screens and the next frame image screen. The following describes the driving process of the transition screen. For the video screen, the electronic paper display device 1 needs to be different according to the length of time that the user views each frame of the image, and details are not described herein. . For each frame transition screen, the specific working process of the electronic paper display device 1 is as follows:

The timing control circuit 12 further generates the frame scan enable signal stv, the drive clock signal clk, the line drive enable signal sth, and the drive enable signal le while providing the drive waveform data, and provides the frame scan enable signal stv to The scan driving circuit 14 provides the line driving enable signal sth and the driving enable signal le to the data driving circuit 16. Specifically, the frame scan enable signal stv is a scan start signal indicating each frame picture. The driving enable signal le is a signal indicating that the driving waveform is started to be applied to each column display unit 105. The line driving enable signal sth is a signal indicating that the waveform data corresponding to the driving of the column display unit 105 is started to be stored. The drive clock signal clk is used for counting.

For each frame transition picture, the frame scan enable signal stv, the drive clock signal clk, the line drive enable signal sth, and the drive enable signal le are periodic square wave pulse signals. Further, for each frame transition picture, by counting the driving clock signal clk, the timing control circuit 12 waits for K driving clock signals after starting the output of the high level pulse of the driving enable signal le. The time of clk, and then output the low-level pulse of the line driving start signal sth, and then wait for the time of the L driving clock signal clk to output the high-level pulse of the driving start signal le, wherein K driving The sum of the time of the clock signal clk and the time of the L drive clock signals clk is equal to the time when each scan line 102 is activated, and K and L are preferably positive integers.

The scan driving circuit 14 receives the frame scan enable signal stv and correspondingly generates the scan signal gclk. The scan driving circuit 14 sequentially applies the scan signal gclk to each of the scan lines 102 to sequentially activate the display unit 105 connected to each of the scan lines 102. The scanning signal gclk has the same duration. The high-level pulse in the scan signal gclk shown in FIG. 2 is the scan signal gclk, and the low-level pulse between each adjacent two high-level pulses actually outputs the scan signals gclk to the scan drive circuit 14. A short time interval between the short time intervals, which is not the actual waveform. The duration of the scanning signal gclk applied to each of the scanning lines 102 by the scan driving circuit 14 is the same.

The data driving circuit 16 receives the driving enable signal le and the line driving enable signal sth, and the driving waveform data. For each column display unit 105, when the data driving circuit 16 receives the driving from the timing control circuit 12 When the initial energy signal le changes from a low level pulse to a high level pulse, the data driving circuit 16 outputs a corresponding driving waveform to the display unit 105 of the corresponding column to charge the display unit 105 or hold the display unit 105 before status. After the time of the K driving clock signals clk, the data driving circuit 16 receives the line driving enable signal sth from the timing control circuit 12 from a low level pulse to a high level pulse, and the data driving circuit 16 starts. The driving waveform data corresponding to the next column display unit 105 is stored, and the driving waveform data stored in the conversion is included as a corresponding driving waveform. When the driving enable signal le received from the timing control circuit 12 is changed from a low level pulse to a high level pulse again, the data driving circuit 16 outputs the converted driving waveform to The next column of display units 105. The driving principle of the other column display unit 105 is analogous. Among them, the driving waveform data is an exponential bit type voltage, and the driving waveform is a waveform composed of an analog type voltage. The data driving circuit 16 stores the driving waveform data corresponding to each column display unit 105 at equal time.

The common voltage generating circuit 18 is for supplying a common voltage to the complex display unit 105.

For each frame transition picture, since the time that the data driving circuit 16 applies the driving waveform to each column display unit 105 is equal, that is, the time of the K driving clock signals clk, and the time is short, the electronic paper display device is caused. 1 It is necessary to display a plurality of transition pictures to update from the current frame image frame to the next frame image frame, that is, the display unit 105 needs to be charged a plurality of times, thereby causing the electronic paper display device 1 to consume more power.

In view of this, it is necessary to provide an electronic paper display device that consumes less power.

In view of the above, it is necessary to provide a driving method of an electronic paper display device that consumes less power.

In view of this, it is necessary to provide a display device that consumes less power.

In view of the above, it is necessary to provide a driving method of a display device that consumes less power.

A driving method of an electronic paper display device, the driving method comprising:

Obtaining the next frame of image data, and comparing with the current frame image data to obtain the required driving waveform data;

Provide the required drive waveform data based on the comparison results;

Providing a driving waveform corresponding to the required driving waveform data to drive the electronic paper display device, so that the electronic paper display device updates from the current frame image frame to the next frame image frame by displaying a plurality of frame transition screens, wherein the current frame The image frame corresponds to the current frame image data, and the next frame image frame corresponds to the next frame image data. The complex frame transition picture is located between the current frame image frame and the next frame image frame, and the driving waveform drives the electronic paper display device in turn. Displaying the complex frame transition picture and the next frame image frame;

Wherein, for the same frame transition picture displayed by the electronic paper display device, the driving method respectively provides drive waveforms having the same duration to each column display unit of the electronic paper display device, and the driving method is provided for different frame transition pictures. The durations of the driving waveforms of the same column display unit to the electronic paper display device are not fixed the same to reduce the number of frames for displaying the transition picture by extending the charging time of at least part of the frame transition picture.

An electronic paper display device comprising:

An electronic paper display panel comprising a plurality of display units arranged in a matrix;

a timing control circuit, wherein the timing control circuit is configured to acquire image data of the next frame, compare the current frame image data to obtain the required driving waveform data, and provide the required driving waveform data according to the comparison result;

a data driving circuit, the data driving circuit receives the driving waveform data, and provides a corresponding driving waveform to the plurality of display units according to the driving waveform data, so that the electronic paper display panel displays the complex frame transition picture from the current frame The image frame is updated to the next frame image frame, wherein the current frame image frame corresponds to the current frame image data, and the next frame image frame corresponds to the next frame image data, and the plurality of frame transition images are located in the current frame image frame and the next frame image frame. The driving waveform drives the electronic paper display panel to sequentially display the plurality of frame transition pictures and the next frame image frame;

Wherein, for the same frame transition picture displayed by the electronic paper display panel, the data driving circuit respectively provides driving waveforms with the same duration to each column display unit of the electronic paper display panel, and the data driving is driven for different frame transition screens. The duration of the driving waveform of the same column display unit provided by the circuit to the electronic paper display panel is not the same, to reduce the number of frames for displaying the transition picture by extending the charging time of at least part of the frame transition picture.

A driving method of a display device, the driving method comprising:

Obtaining the next frame of image data, and comparing with the current frame image data to obtain the required driving waveform data;

Provide the required drive waveform data based on the comparison results;

Providing a driving waveform corresponding to the required driving waveform data to drive the display device, so that the display device updates from the current frame image frame to the next frame image frame by displaying a plurality of frame transition screens, wherein the current frame image frame corresponds to the current frame image The frame image data, the next frame image frame corresponds to the next frame image data, the complex frame transition picture is located between the current frame image frame and the next frame image frame, and the driving waveform drives the display device to sequentially display the plurality of frame transitions Picture and next frame of image;

Wherein, for the same frame transition picture displayed by the display device, the driving method respectively provides driving waveforms with the same duration to each column display unit of the display device, and the driving method is provided to the display device for different frame transition pictures The durations of the driving waveforms of the same column display unit are not fixed the same to reduce the number of frames displaying the transition picture by extending the charging time of at least part of the frame transition picture.

A display device comprising:

a display panel comprising a plurality of display units arranged in a matrix;

a timing control circuit, wherein the timing control circuit is configured to acquire image data of the next frame, compare the current frame image data to obtain the required driving waveform data, and provide the required driving waveform data according to the comparison result;

a data driving circuit, the data driving circuit receives the driving waveform data, and provides a corresponding driving waveform to the plurality of display units according to the driving waveform data, so that the display panel displays the complex frame transition screen from the current frame image frame Updating to the next frame image, wherein the current frame image corresponds to the current frame image data, and the next frame image frame corresponds to the next frame image data, and the complex frame transition picture is located between the current frame image frame and the next frame image frame The driving waveform drives the display panel to sequentially display the complex frame transition picture and the next frame image frame;

Wherein, for the same frame transition picture displayed by the display panel, the data driving circuit respectively provides driving waveforms with the same duration to each column display unit of the display panel, and the data driving circuit provides the data to the different frame transition screens. The durations of the driving waveforms of the same column display unit of the display panel are not fixed the same to reduce the number of frames displaying the transition picture by extending the charging time of at least part of the frame transition picture.

Compared with the prior art, for different frame transition pictures, since the time of the driving waveform applied by the data driving circuit to the display unit of the same column is not the same, and the time is long, the electronic paper display device and the display device need to display less. The transition picture can be updated from the current frame image frame to the next frame image frame, that is, the number of times of charging each display unit is reduced, thereby reducing the number of times of operation of components such as the data driving circuit, thereby reducing the display device of the electronic paper display device. Power loss.

1, 3‧‧‧electronic paper display device

2, 4‧‧‧ image system

10, 30‧‧‧electronic paper display panel

12, 32‧‧‧ timing control circuit

14, 34‧‧‧ scan drive circuit

16, 36‧‧‧ data drive circuit

18, 38‧‧‧Common voltage generating circuit

102, 302‧‧‧ scan lines

104, 304‧‧‧ data line

105, 305‧‧‧ display unit

306‧‧‧Switch

308‧‧‧ pixel electrodes

310‧‧‧Common electrode

312‧‧‧ Display media layer

312a‧‧ microcapsules

312b‧‧‧First Electrophoretic Particles

312c‧‧‧Second Electrophoretic Particles

306a‧‧‧Control end

306b‧‧‧First conduction end

306c‧‧‧second conduction end

Stv‧‧‧ frame scan enable signal

Clk‧‧‧ drive clock signal

Sth‧‧‧ line driver turn-on signal

Le‧‧‧ drive start signal

Gclk‧‧‧ scan signal

Data‧‧‧Drive waveform data

121, 321‧‧‧ lookup table

1 is a schematic structural view of a conventional electronic paper display device.

2 is a driving waveform diagram of the electronic paper display device shown in FIG. 1.

3 is a schematic structural view of a preferred embodiment of an electronic paper display device of the present invention.

4 is a partial cross-sectional structural view of the electronic paper display device shown in FIG.

Fig. 5 is a view showing driving waveforms of the electronic paper display device shown in Fig. 3.

6 is a flow chart showing a driving method of the electronic paper display device shown in FIG.

The invention will be further described in detail below with reference to the accompanying drawings. This embodiment is described by taking an electronic paper display device as an example, and the present invention is also applicable to other suitable types of display devices.

Please refer to FIG. 3, FIG. 4 and FIG. 5. FIG. 3 is a schematic structural view of a preferred embodiment of the electronic paper display device of the present invention. 4 is a partial cross-sectional structural view of the electronic paper display device shown in FIG. Fig. 5 is a view showing driving waveforms of the electronic paper display device shown in Fig. 3. In Fig. 5, the lower half of the waveform (b) is a partially enlarged schematic view of the upper half of the waveform (a). Among them, the upper half of the waveform (a) omits the drive clock signal clk (see the lower half of the waveform (b)), the lower half of the waveform (b) omits the frame scan enable signal stv (see the upper half of the waveform) (a)). The electronic paper display device 3 includes an electronic paper display panel 30, a timing control circuit 32, a scan driving circuit 34, a data driving circuit 36, and a common voltage generating circuit 38. The timing control circuit 32 is connected to the scan driving circuit 34 and the data driving circuit 36, respectively. The scan driving circuit 34, the data driving circuit 36, and the common voltage generating circuit 38 are connected to the electronic paper display panel 30, respectively.

The electronic paper display panel 30 includes a plurality of scanning lines 302, a plurality of data lines 304 insulated from the complex scanning lines 302, and a plurality of display units 305 arranged in a matrix. Each display unit 305 includes a switch 306 at the intersection of the scan line 302 and the data line 304, a pixel electrode 308, a common electrode 310, and a display medium layer 312 sandwiched between the pixel electrode 308 and the common electrode 310 ( See Figure 4). In the present embodiment, each display unit 305 shares the common electrode 310 and the display medium layer 312.

The switch 306 includes a control end 306a, a first conductive end 306b, and a second conductive end 306c. Preferably, the switch 306 is a thin film transistor (TFT), the control terminal 306a is a gate, the first conductive end 306b is a source, and the second conductive end 306c is a drain. The control terminal 306a is connected to the scan driving circuit 34 by a corresponding scan line 302. The first conductive terminal 306b is connected to the data driving circuit 36 by a corresponding data line 304. The second conductive terminal 306c is connected to The pixel electrode 308. The common electrode 310 is connected to the common voltage generating circuit 38.

The display medium layer 312 is bonded between the common electrode 310 and the pixel electrode 308 by an adhesive. In the present embodiment, the display medium layer 312 is a bistable electrophoretic display medium layer, and the medium layer is displayed by microcapsule electrophoresis. The electrophoretic display medium layer 312 includes a plurality of microcapsules 312a, each of which encapsulates a plurality of first electrophoretic particles 312b, a plurality of second electrophoretic particles 312c, and a transparent liquid (not labeled). The plurality of first electrophoretic particles 312b and the plurality of second electrophoretic particles 312c have different electrical and optical characteristics. The first electrophoretic particles 312b and the second electrophoretic particles 312c are directionalally moved in the microcapsules 312a according to the voltage applied between the pixel electrodes 308 and the common electrode 310, and the first electrophoresis is controlled by controlling the direction of the electric field. The moving direction of the particles 312b and the second electrophoretic particles 312c further controls the content displayed by the electronic paper display device 3. It should be noted that the display medium layer 312 of the present invention may adopt other structures. For example, if the liquid in the microcapsule 312a is a black liquid, only white particles may be disposed in the microcapsule 312a.

The common voltage generating circuit 38 is for supplying a common voltage to the complex display unit 305.

The timing control circuit 32 stores therein a lookup table 321 in which a complex gray scale conversion relationship and drive waveform data corresponding to each gray scale conversion relationship are prestored. The grayscale conversion relationship refers to changing from one grayscale to another grayscale, and the two grayscales may be the same or different.

The timing control circuit 32 receives the image data output by an external image system 4, and compares the next frame image data with the current frame image data to obtain the required driving waveform data (see the driving waveform Data in FIG. 5). The timing control circuit 32 searches the lookup table 321 to retrieve the required driving waveform data and outputs the extracted driving waveform data to the data driving circuit 36. The data driving circuit 36 receives the driving waveform data, and provides a corresponding driving waveform to the complex display unit 305 according to the driving waveform data, so that the electronic paper display panel 30 displays the complex frame image from the current frame image. The screen is updated to the next frame image, wherein the current frame image corresponds to the current frame image data, and the next frame image corresponds to the next frame image, and the plurality of frame transition images are located in the current frame image frame and the next frame image frame. The driving waveform drives the electronic paper display surface 30 to sequentially display the plurality of frame transition pictures and the next frame image frame. The following is a description of the driving process of the transition picture. For the image picture, the electronic paper display device 3 needs to be different according to the length of time that the user views each frame of the image, and is also learned by the industry. Known technology, so I won't go into details here. For each frame transition screen, the specific working process of the electronic paper display device 3 is as follows:

The timing control circuit 32 further generates the frame scan enable signal stv, the drive clock signal clk, the line drive enable signal sth, and the drive enable signal le while providing the drive waveform data, and provides the frame scan enable signal stv to The scan driving circuit 34 provides the line driving enable signal sth and the driving enable signal le to the data driving circuit 26. Specifically, the driving clock signal clk is a periodically varying square wave pulse signal. The frame scan enable signal stv, the line drive enable signal sth, and the drive enable signal le are square wave pulse signals. The duration of the high-level pulse of the frame scan enable signal stv is not the same, the duration of the high-level pulse of the line drive enable signal sth is not the same, and the duration of the low-level pulse of the drive start signal le Not fixed the same.

The frame scan enable signal stv is a scan start signal indicating each frame picture. The driving enable signal le is a signal indicating that the driving waveform is started to be applied to each column display unit 305. The line drive enable signal sth is a signal indicating that the corresponding waveform data applied to the column display unit 305 is started to be stored. The drive clock signal clk is used for counting.

The scan driving circuit 34 receives the frame scan enable signal stv and generates a series of scan signals gclk within the duration of the high level pulse of the frame scan enable signal stv. The scan driving circuit 34 sequentially applies the scan signal gclk to each scan line 302 to sequentially activate the display unit 305 connected to each scan line 302. The high-level pulse in the scan signal gclk shown in FIG. 5 is the scan signal gclk, and the low-level pulse between each adjacent two high-level pulses actually outputs the scan signals gclk to the scan drive circuit 34. A short time interval between the short time intervals, which is not the actual waveform. The duration of the scanning signal gclk applied to each of the scanning lines 302 by the scan driving circuit 34 is not the same.

The data driving circuit 36 receives the driving enable signal le and the line driving enable signal sth, and the driving waveform data, and provides a corresponding driving waveform to the complex display unit 305 according to the driving waveform data, so that the electronic paper The display panel 30 updates from the current frame image screen to the next frame image screen by displaying the complex frame transition screen. Further, for the same frame transition screen displayed by the electronic paper display panel 30, the data driving circuit 36 respectively supplies driving waveforms having the same duration to the column display units 305 of the electronic paper display panel 30. For different frame transition pictures, the durations of the driving waveforms provided by the data driving circuit 36 to the same column display unit 305 of the electronic paper display panel 30 are not the same, to reduce the display by extending the charging time of at least part of the frame pictures. The number of frames of the transition screen.

In addition, before the data driving circuit 36 supplies the driving waveform to the corresponding column display unit 305 of the electronic paper display panel 30, the data driving circuit 36 further stores driving waveform data corresponding to the driving waveform. For each frame transition picture, the data driving circuit 36 stores the driving waveform data corresponding to each column of the display unit 305 at the same time.

Specifically, taking a two-frame transition picture (see FIG. 5) as an example, for the previous frame transition picture in the two-frame transition picture, when the data driving circuit 36 receives the driving start signal from the timing control circuit 32 When the le pulse changes from the low level pulse to the high level pulse, the data driving circuit 36 outputs the corresponding driving waveform to the display unit 305 of the corresponding column to charge the column display unit 305 or hold the column display unit 305. The state of a frame. After M (M is preferably a positive integer) of the driving clock signal clk, the data driving circuit 36 receives the line driving start signal sth from the timing control circuit 32 from a low level pulse to a high level pulse. The data driving circuit 36 starts to store the driving waveform data corresponding to the next column display unit 305, and includes converting the stored driving waveform data into corresponding driving waveforms. The time for converting the driving waveform data into the corresponding driving waveform is short, and the time for storing the driving waveform data is long, and the time for converting the driving waveform data into the corresponding driving waveform is negligible compared with the time for storing the driving waveform data. The time at which the drive waveform data is stored is L (L is preferably a positive integer) times of the drive clock signal clk. The driving clock signal clk is the same as the driving clock signal clk in the prior art, that is, the time for storing the driving waveform data is the same as the time for storing the driving waveform data in the prior art. The sum of the times of the M drive clock signals clk and the time of the L drive clock signals clk is the time of the scan signal gclk currently applied to the column display unit 305.

Further, when the driving enable signal le received from the timing control circuit 32 by the data driving circuit 36 is changed from the low level pulse to the high level pulse again, the data driving circuit 36 outputs the converted The drive waveform is given to the next column display unit 305. The driving principle of the other column display unit 305 is analogous. Among them, the driving waveform data is an exponential bit type voltage, and the driving waveform is a waveform composed of an analog type voltage.

For the subsequent one-frame transition picture in the two-frame transition picture, the driving principle is similar to the driving principle of the previous frame transition picture in the two-frame transition picture, the main difference being that the data driving circuit 36 is applied to each column display unit 306. The duration of the drive waveform is N (N is preferably a positive integer) times of the drive clock signal clk. Wherein, M, N are preferably greater than the K value in the prior art, and the driving clock signal clk is the same as the driving clock signal clk in the prior art. Thereby, the display time of one frame of picture is extended. Alternatively, one of M, N may be greater than the K value, the other equal to or less than the K value, and M+N > 2K.

The two-frame transition picture can be extended to other frame transition pictures, and the duration of the driving waveform applied by the data driving circuit 36 to each column display unit 306 is greater than or partially greater than the time of the K driving clock signals clk, as long as the time The number of frames of the transition picture is reduced as compared with the number of frames of the transition picture in the prior art.

Alternatively, the duration of the driving waveform supplied to the column display unit 305 of the electronic paper display panel 30 by the data driving circuit 36 may be limited as follows. There is at least one frame transition picture, and the duration of the driving waveform supplied to the column display unit 305 of the electronic paper display panel 30 by the data driving circuit 36 is greater than a predetermined time value, and the predetermined time value is calculated as: Where t ₁ represents the predetermined time value, t ₂ is the time at which the drive waveform data corresponding to each column display unit 305 is stored, and T is the sum of the total display times of the complex frame transition pictures, P is the total time In T, for each frame transition picture, each column display unit 305 is driven by the same duration driving waveform, and the driving method corresponding to the driving waveform data of each column display unit 305 is stored at the same time as the above time t ₂ . The total number of frames of the transition screen can be displayed by the drive electronic paper display device 3, and Q is the total number of columns of the display unit 305 of the electronic paper display device 3.

For different frame transition pictures, since the time that the data driving circuit 36 applies the driving waveforms to the same column display unit 305 is not the same, and the time is long, the electronic paper display device 3 needs to display less transition pictures from the current frame. The image frame is updated to the next frame image, that is, the number of times the display unit 305 is charged is reduced, so that the number of operations of the components such as the scan driving circuit 34 and the data driving circuit 36 can be reduced, thereby reducing the power of the electronic paper display device 3. loss.

Please refer to FIG. 6. FIG. 6 is a flow chart of a driving method of the electronic paper display device 3. The driving method includes:

Step S1: acquiring the next frame image data, and comparing with the current frame image data to obtain the required driving waveform data;

Step S2: searching a lookup table of the complex driving waveform data pre-stored with the corresponding complex gray scale conversion relationship, acquiring the required driving waveform data, and outputting the driving waveform data;

Step S3: receiving and storing the driving waveform data;

Step S4: providing a scan signal to activate the corresponding column display unit;

For the same frame transition screen, the driving method provides scanning signals of the same duration to each column display unit of the electronic paper display device 3, and the driving method is provided to the electronic paper display device 3 for different frame transition screens. The duration of the scan signals of the same column display unit is not the same, to reduce the number of frames for displaying the transition picture by extending the charging time of at least part of the frame transition picture.

Step S5: providing the corresponding driving waveform according to the stored driving waveform data to drive the electronic paper display device 3, and causing the electronic paper display device 3 to update from the current frame image frame to the next frame image frame by displaying the complex frame transition screen. .

The current frame image frame corresponds to the current frame image data, and the next frame image frame corresponds to the next frame image data. The complex frame transition picture is located between the current frame image frame and the next frame image frame, and the driving waveform drives the electronic The paper display device 3 sequentially displays the plurality of frame transition pictures and the next frame image frames.

It can be understood that, for the same frame transition picture displayed by the electronic paper display device 3, the driving method respectively provides driving waveforms with the same duration to each column display unit 305 of the electronic paper display device 3, and transition frames for different frames. The driving method provides that the durations of the driving waveforms of the same column display unit 305 of the electronic paper display device 3 are not the same, to reduce the number of frames for displaying the transition picture by extending the charging time of at least part of the frame transition picture.

The duration of the driving waveform supplied to each column display unit of the electronic paper display device by the driving method can be limited as follows: at least one frame transition screen is provided, and the driving method is provided to each column of the electronic paper display device The duration of the driving waveform of the display unit is greater than a predetermined time value, and the predetermined time value is calculated as: Where t ₁ represents the predetermined time value, t ₂ is the time at which the drive waveform data corresponding to each column of the display unit is stored, T is the sum of the total display times of the complex frame transition pictures, and P is the total time T In the case of different frame transition pictures, each column display unit is driven by the same duration driving waveform, and the driving method corresponding to the driving waveform data of each column display unit is stored at the same time as the above time t ₂ to drive the electronic paper. The display device can display the total number of frames of the transition screen, and Q is the total number of columns of the display unit of the electronic paper display device.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

no

3‧‧‧Electronic paper display device

4‧‧‧Image System

30‧‧‧Electronic paper display panel

32‧‧‧Sequence Control Circuit

34‧‧‧Scan drive circuit

36‧‧‧Data Drive Circuit

38‧‧‧Common voltage generating circuit

302‧‧‧ scan line

304‧‧‧Information line

305‧‧‧Display unit

306‧‧‧Switch

308‧‧‧ pixel electrodes

310‧‧‧Common electrode

306a‧‧‧Control end

306b‧‧‧First conduction end

306c‧‧‧second conduction end

321‧‧‧ lookup table

Claims (28)

A driving method of an electronic paper display device, the driving method comprising:
Obtaining the next frame of image data, and comparing with the current frame image data to obtain the required driving waveform data;
Providing the required driving waveform data according to the comparison result; and providing a driving waveform corresponding to the required driving waveform data to drive the electronic paper display device according to the required driving waveform data, so that the electronic paper display device transitions through displaying the plurality of frames The screen is updated from the current frame image frame to the next frame image frame, wherein the current frame image frame corresponds to the current frame image data, and the next frame image frame corresponds to the next frame image data, and the complex frame transition screen is located in the current frame image frame and Between the next frame of image images, the driving waveform drives the electronic paper display device to sequentially display the plurality of frame transition pictures and the next frame image frame;
Wherein, for the same frame transition picture displayed by the electronic paper display device, the driving method respectively provides drive waveforms having the same duration to each column display unit of the electronic paper display device, and the driving method is provided for different frame transition pictures. The durations of the driving waveforms of the same column display unit to the electronic paper display device are not fixed the same to reduce the number of frames for displaying the transition picture by extending the charging time of at least part of the frame transition picture. The driving method of the electronic paper display device according to claim 1, wherein after comparing the next frame image data with the current frame image data, the driving method further comprises: searching for a pre-stored corresponding complex gray scale according to the comparison result A lookup table of the complex drive waveform data of the conversion relationship, retrieves the required drive waveform data, and provides the required drive waveform data. The driving method of the electronic paper display device according to claim 2, wherein, for each frame transition screen, before the driving waveform is supplied to the corresponding column display unit of the electronic paper display device, the driving method further includes storing and driving the driving The corresponding waveform of the drive waveform. The driving method of the electronic paper display device according to claim 3, wherein the time for storing the driving waveform data corresponding to each column of display units is the same for different frame transition pictures. The driving method of the electronic paper display device according to claim 4, wherein there is at least one frame transition screen, and the driving method provides that the driving waveform of each column display unit of the electronic paper display device has a duration greater than a predetermined time value , the calculation formula of the predetermined time value is: Where t ₁ represents the predetermined time value, t ₂ is the time at which the drive waveform data corresponding to each column of the display unit is stored, T is the sum of the total display times of the complex frame transition pictures, and P is the total time T In the case of different frame transition pictures, each column display unit is driven by the same duration driving waveform, and the driving method corresponding to the driving waveform data of each column display unit is stored at the same time as the above time t ₂ to drive the electronic paper. The display device can display the total number of frames of the transition screen, and Q is the total number of columns of the display unit of the electronic paper display device. The driving method of the electronic paper display device according to claim 5, wherein a partial frame transition screen exists in the plurality of frame transition screens, and the driving method is provided to a driving waveform of each column display unit of the electronic paper display device The duration is greater than the predetermined time value, and for the other frame transition pictures in the complex frame transition picture, the duration of the driving waveform applied to the column display units of the electronic paper display device by the driving method is equal to the predetermined time value. The driving method of the electronic paper display device according to claim 1, wherein before the driving waveform is supplied to the corresponding column display unit of the electronic paper display device, the driving method further includes providing a scan signal to activate the corresponding column display The unit receives the driving waveform, and for the same frame transition picture displayed by the electronic paper display device, the driving method respectively provides scanning signals with the same duration to each column display unit of the electronic paper display device, and for different frame transition screens, The driving method provides that the scanning signals of the same column display unit of the electronic paper display device have a non-fixed duration of time to reduce the number of frames for displaying the transition picture by extending the charging time of at least part of the frame transition picture. An electronic paper display device comprising:
An electronic paper display panel comprising a plurality of display units arranged in a matrix;
a timing control circuit, configured to acquire image data of a next frame, and compare with the current frame image data to obtain a required driving waveform data, and provide required driving waveform data according to the comparison result; and a data driving circuit, The data driving circuit receives the driving waveform data, and provides a corresponding driving waveform to the plurality of display units according to the driving waveform data, so that the electronic paper display panel is updated from the current frame image to the lower portion by displaying a plurality of frame transition pictures. a frame image image, wherein the current frame image frame corresponds to the current frame image data, the next frame image frame corresponds to the next frame image data, and the plurality of frame transition images are located between the current frame image frame and the next frame image frame, Driving the waveform driving the electronic paper display panel to sequentially display the plurality of frame transition pictures and the next frame image frame;
Wherein, for the same frame transition picture displayed by the electronic paper display panel, the data driving circuit respectively provides driving waveforms with the same duration to each column display unit of the electronic paper display panel, and the data driving is driven for different frame transition screens. The duration of the driving waveform of the same column display unit provided by the circuit to the electronic paper display panel is not the same, to reduce the number of frames for displaying the transition picture by extending the charging time of at least part of the frame transition picture. The electronic paper display device according to claim 8, wherein the timing control circuit stores a lookup table storing a complex gray scale conversion relationship and driving waveform data corresponding to each gray scale conversion relationship, the timing The control circuit searches the lookup table according to the comparison result, retrieves the required driving waveform data, and outputs the extracted driving waveform data to the data driving waveform data. The electronic paper display device of claim 9, wherein, for each frame transition screen, the data driving circuit further stores the data before the data driving circuit supplies the driving waveform to the corresponding column display unit of the electronic paper display panel Drive waveform data corresponding to the drive waveform. The electronic paper display device of claim 10, wherein the data driving circuit stores the driving waveform data corresponding to each column of display units for the same time for different frame transition pictures. The electronic paper display device of claim 11, wherein there is at least one frame transition screen, and the data driving circuit provides a driving waveform of each column display unit of the electronic paper display panel for a duration greater than a predetermined time value, The calculation formula for the predetermined time value is: Where t ₁ represents the predetermined time value, t ₂ is the time at which the drive waveform data corresponding to each column of the display unit is stored, T is the sum of the total display times of the complex frame transition pictures, and P is the total time T In the case of different frame transition pictures, each column display unit is driven by the same duration driving waveform, and the driving method corresponding to the driving waveform data of each column display unit is stored at the same time as the above time t ₂ to drive the electronic paper. The display device can display the total number of frames of the transition screen, and Q is the total number of columns of the display unit of the electronic paper display device. The electronic paper display device of claim 12, wherein a partial frame picture exists in the plurality of frame transition pictures, and the data driving circuit provides a duration of driving waveforms of the display units of each column of the electronic paper display panel More than the predetermined time value, and for other frame pictures in the complex frame transition picture, the duration of the driving waveform supplied to the column display units of the electronic paper display panel by the data driving circuit is equal to the predetermined time value. The electronic paper display device of claim 8, wherein the electronic paper display device further comprises a scan driving circuit for providing a scan signal for activating a corresponding display unit to receive a drive waveform for the electronic paper display panel The same frame transition screen is displayed, the scan driving circuit respectively provides scan signals of the same duration to each column display unit of the electronic paper display panel, and the scan driving circuit is provided to the electronic paper display panel for different frame transition screens The duration of the scan signals of the same column display unit is not the same, to reduce the number of frames for displaying the transition picture by extending the charging time of at least part of the frame transition picture. A driving method of a display device, the driving method comprising:
Obtaining the next frame of image data, and comparing with the current frame image data to obtain the required driving waveform data;
Providing the required driving waveform data according to the comparison result; and providing a driving waveform corresponding to the required driving waveform data to drive the display device according to the required driving waveform data, so that the display device is from the current by displaying the complex frame transition screen The frame image frame is updated to the next frame image frame, wherein the current frame image frame corresponds to the current frame image data, and the next frame image frame corresponds to the next frame image data, and the plurality of frame transition images are located in the current frame image frame and the next frame image. Between the screens, the driving waveform drives the display device to sequentially display the complex frame transition picture and the next frame image frame;
Wherein, for the same frame transition picture displayed by the display device, the driving method respectively provides driving waveforms with the same duration to each column display unit of the display device, and the driving method is provided to the display device for different frame transition pictures The durations of the driving waveforms of the same column display unit are not fixed the same to reduce the number of frames displaying the transition picture by extending the charging time of at least part of the frame transition picture. The driving method of the display device according to claim 15, wherein after comparing the next frame image data with the current frame image data, the driving method further comprises: searching for a pre-stored corresponding complex gray-scale conversion relationship according to the comparison result. The complex drive waveform data lookup table retrieves the required drive waveform data and provides the required drive waveform data. The driving method of the display device according to claim 16, wherein, for each frame transition screen, before the driving waveform is supplied to the corresponding column display unit of the display device, the driving method further includes storing the driving waveform corresponding to the driving waveform Drive waveform data. The driving method of the display device according to claim 17, wherein the time for storing the driving waveform data corresponding to each column of the display unit is the same for different frame transition pictures. The driving method of the display device according to claim 18, wherein there is at least one frame transition screen, and the driving method provides a driving waveform of each column display unit of the display device for a duration greater than a predetermined time value, the predetermined time The value is calculated as: Where t1 represents the predetermined time value, t ₂ is the time at which the drive waveform data corresponding to each column of display units is stored, T is the sum of the total display times of the complex frame transition pictures, and P is the total time T For different frame transition screens, each column display unit is driven by a driving waveform of the same duration, and a driving method for storing driving waveform data corresponding to each column display unit is performed at the same time as the above time t ₂ to drive the display device. The total number of frames of the transition screen can be displayed, and Q is the total number of columns of the display unit of the display device. The driving method of the display device according to claim 19, wherein a partial frame transition picture exists in the plurality of frame transition pictures, and the driving method provides that the driving waveforms of the display units of each column of the display device have a duration greater than The predetermined time value, and for other frame transition pictures in the complex frame transition picture, the duration of the driving waveform applied to the column display units of the display device by the driving method is equal to the predetermined time value. The driving method of the display device according to claim 15, wherein before the driving waveform is supplied to the corresponding column display unit of the display device, the driving method further comprises providing a scan signal to activate the corresponding column display unit to receive the driving waveform. For the same frame transition picture displayed by the display device, the driving method respectively provides scanning signals with the same duration to each column display unit of the display device, and for different frame transition pictures, the driving method is provided to the display device. The durations of the scan signals of the same column display unit are not the same, to reduce the number of frames for displaying the transition picture by extending the charging time of at least part of the frame transition picture. A display device comprising:
a display panel comprising a plurality of display units arranged in a matrix;
a timing control circuit, configured to acquire image data of a next frame, and compare with the current frame image data to obtain a required driving waveform data, and provide required driving waveform data according to the comparison result; and a data driving circuit, The data driving circuit receives the driving waveform data, and provides a corresponding driving waveform to the plurality of display units according to the driving waveform data, so that the display panel updates from the current frame image frame to the next frame by displaying the complex frame transition picture The image frame, wherein the current frame image frame corresponds to the current frame image data, and the next frame image frame corresponds to the next frame image data, and the plurality of frame transition images are located between the current frame image frame and the next frame image frame, the driving waveform Driving the display panel to sequentially display the complex frame transition picture and the next frame image frame;
Wherein, for the same frame transition picture displayed by the display panel, the data driving circuit respectively provides driving waveforms with the same duration to each column display unit of the display panel, and the data driving circuit provides the data to the different frame transition screens. The durations of the driving waveforms of the same column display unit of the display panel are not fixed the same to reduce the number of frames displaying the transition picture by extending the charging time of at least part of the frame transition picture. The display device according to claim 22, wherein the timing control circuit stores a lookup table storing a complex gray scale conversion relationship and driving waveform data corresponding to each gray scale conversion relationship, the timing control circuit Finding the lookup table according to the comparison result, extracting the required driving waveform data and outputting the extracted driving waveform data to the data driving waveform data. The display device according to claim 23, wherein, for each frame transition picture, the data driving circuit further stores the driving waveform before the data driving circuit supplies the driving waveform to the corresponding column display unit of the electric display panel Corresponding drive waveform data. The display device according to claim 24, wherein the data driving circuit stores the driving waveform data corresponding to each column of display units for the same time for different frame transition pictures. The display device according to claim 25, wherein there is at least one frame transition screen, and the data driving circuit provides a driving waveform of each column display unit of the display panel for a duration greater than a predetermined time value, the predetermined time value The calculation formula is: Where t ₁ represents the predetermined time value, t ₂ is the time at which the drive waveform data corresponding to each column of the display unit is stored, T is the sum of the total display times of the complex frame transition pictures, and P is the total time T In the case of different frame transition pictures, each column display unit is driven by the same duration driving waveform, and the driving method corresponding to the driving waveform data of each column display unit is stored at the same time as the above time t ₂ to drive the display device. The total number of frames of the transition picture can be displayed, and Q is the total number of columns of the display unit of the display device. The display device according to claim 26, wherein a partial frame picture exists in the plurality of frame transition pictures, and a duration of a driving waveform of each column display unit provided by the data driving circuit to the display panel is greater than the predetermined a time value, and for other frame pictures in the complex frame transition picture, the duration of the driving waveform supplied to the display unit of each column of the display panel by the data driving circuit is equal to the predetermined time value. The display device of claim 22, wherein the display device further comprises a scan driving circuit for providing a scan signal for activating the corresponding display unit to receive the drive waveform for the same frame transition displayed by the display panel a scanning circuit for providing scan signals of the same duration to each column display unit of the display panel. For different frame transition screens, the scan driving circuit provides a continuous scan signal to the display unit of the display panel of the display panel. The time is not fixed the same to reduce the number of frames displaying the transition picture by extending the charging time of at least part of the frame transition picture.